Final answer:
The third step in creating a big graphics program is implementing the desired functionality using programming languages and tools.
Step-by-step explanation:
The third step in creating a big graphics program is implementing the desired functionality using programming languages and tools.
Once the design and planning stages are complete, the programmer will write the code to bring the graphics program to life. This involves using programming languages such as C++, Java, or Python, and incorporating libraries or frameworks that provide graphics capabilities. The code will include instructions for creating and manipulating graphics elements, handling user input, and managing other program features.